3. 4Na + O 2  2Na 2 O How many grams of Sodium Oxide can be produced from 25g of Sodium? 25 g Na 1 mole 23.0g 23.0g =1.08 mole Na 2Na 2 O 2Na 2 O 4 Na 4 Na =0.54 mole Na 2 O 62 g 62 g 1 mole =33.7 g Na 2 O

4. 2K + 2H 2 O  2KOH + H 2 How many grams of Water are needed to react with 88g of Potassium? 88 g K 1 mole 39.1g 39.1g =2.25 mole K 2 H 2 O 2 H 2 O 2 K 2 K =2.25 mole H 2 O 18 g 18 g 1 mole =40.51 g H 2 O

5. 4Fe + 3O 2  2Fe 2 O 3 What mass of Iron (III) Oxide can be formed from 6.0g of Iron? 6.0g Fe 1 mole 55.85g 55.85g =0.107 mole Fe 2 Fe 2 O 3 2 Fe 2 O 3 4 Fe 4 Fe =0.0535 mole Fe 2 O 3 159.7 g 159.7 g 1 mole =8.54 g Fe 2 O 3

6. 2Al + 6HCl  2AlCl 3 + 3H 2 What mass of Hydrogen gas will be produced from the RXN of 10g of Aluminum metal? 10g Al 1 mole 26.98g =0.370 mole Al 3 H 2 3 H 2 2 Al 2 Al =0.55 mole H 2 2 g__ 2 g__ 1 mole =1.11g H 2

7. 2NaOH + H 2 SO 4  Na 2 SO 4 + 2H 2 O What mass of NaOH is needed to react with 50g of H 2 SO 4 ? 50g H 2 SO 4 1 mole 98.0g 98.0g =0.51 mole H 2 SO 4 2 NaOH 2 NaOH 1 H 2 SO 4 1 H 2 SO 4 =1.02 mole NaOH 40 g 40 g 1 mole =40.80g NaOH